A novel ternary CuO decorated Ag3AsO4/GO hybrid as a Z-scheme photocatalyst for enhanced degradation of phenol under visible light. (18th January 2017)

• Record Type: Journal Article
• Authors: Rakibuddin, Md.; Mandal, Subrata; Ananthakrishnan, Rajakumar
• Is Part Of: New journal of chemistry. Volume 41:Number 3(2017)
• Page Start: 1380
• Page End: 1389
• Publication Date: 2017-01-18
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj02366e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A novel Z-scheme ternary CuO/Ag3 AsO4 /GO hybrid having significant visible light catalytic activity and stability is successfully synthesized via a self-assembly method. Abstract : A novel CuO decorated Ag3 AsO4 /GO (CuO/Ag3 AsO4 /GO) ternary hybrid system is fabricated by an electrostatically-driven assembly method. The CuO nanostructure is obtained from a nano-coordination polymer by a facile solid-state transformation route. The prepared CuO/Ag3 AsO4 /GO hybrid shows a well-defined crystalline structure, where nanosized CuO particles (20 nm) are decorated on Ag3 AsO4 spheres (150 nm) and further distributed on the GO sheets. The prepared CuO/Ag3 AsO4 /GO hybrid is characterized by PXRD, FT-IR, XPS, EDX, TEM, HRTEM, FESEM, UV-Vis DRS, BET and PL measurements. The CuO/Ag3 AsO4 /GO hybrid exhibits improvement in the visible light photodegradation of phenol compared to the CuO/Ag3 AsO4 or Ag3 AsO4 /GO hybrid. The higher catalytic activity of the material can be ascribed to an increase in light harvesting, effective electron–hole separation and high surface area of the material. Furthermore, the CuO/Ag3 AsO4 /GO photocatalyst exhibits excellent photo-stability and reusability for more than five successive cycles signifying its potential applications in wastewater treatment. Interestingly, a Z-scheme type photocatalytic mechanism is proposed for the CuO/Ag3 AsO4 /GO hybrid under visible light.